About Sanguine hurting Oliver...actually, he would have a fairly easy time restraining her, if he was aware of it. She's a spellcaster after all, so very poor strength and dexterity stats. Even with vampire bonuses. After all, he's the same level as her. So equal in terms of overall power. His power just lies in the physical, while hers lie in the magical. At most he might end up with a bite mark or some scratches.

That being said, if she were to ambush him that might be more dangerous. Or even worse, if she got time to prepare. As then she could cast buffs, summon minions, and other such things beforehand. Though I doubt that would happen any time soon. :P